There was an option added to bulk read unread books to pets through Kumos. Using my pet Firelight as an example: https://kumos.subeta.net/pets/5864934/books?tab=available

Now when I select a bunch of books to read to my pet (doesn't seem to matter how many) the page refreshes and no books are read to my pet. I get the below error message on legacy Subeta and Kumos.

❌ Failed to process books for Firelight after multiple attempts. Please contact support.